类 HeaderMethodArgumentResolver
- java.lang.Object
- org.springframework.messaging.handler.annotation.support.AbstractNamedValueMethodArgumentResolver
- org.springframework.messaging.handler.annotation.support.HeaderMethodArgumentResolver
- 所有已实现的接口:
HandlerMethodArgumentResolver
public class HeaderMethodArgumentResolver extends AbstractNamedValueMethodArgumentResolver
Resolves method parameters annotated with@Header
.- 从以下版本开始:
- 4.0
- 作者:
- Rossen Stoyanchev
嵌套类概要
从类继承的嵌套类/接口 org.springframework.messaging.handler.annotation.support.AbstractNamedValueMethodArgumentResolver
AbstractNamedValueMethodArgumentResolver.NamedValueInfo
构造器概要
构造器 构造器 说明 HeaderMethodArgumentResolver(ConversionService cs, ConfigurableBeanFactory beanFactory)
方法概要
所有方法 实例方法 具体方法 修饰符和类型 方法 说明 protected AbstractNamedValueMethodArgumentResolver.NamedValueInfo
createNamedValueInfo(MethodParameter parameter)
Create theAbstractNamedValueMethodArgumentResolver.NamedValueInfo
object for the given method parameter.protected void
handleMissingValue(String headerName, MethodParameter parameter, Message<?> message)
Invoked when a named value is required, butAbstractNamedValueMethodArgumentResolver.resolveArgumentInternal(MethodParameter, Message, String)
returnednull
and there is no default value.protected Object
resolveArgumentInternal(MethodParameter parameter, Message<?> message, String name)
Resolves the given parameter type and value name into an argument value.boolean
supportsParameter(MethodParameter parameter)
Whether the given method parameter is supported by this resolver.从类继承的方法 org.springframework.messaging.handler.annotation.support.AbstractNamedValueMethodArgumentResolver
handleResolvedValue, resolveArgument
构造器详细资料
HeaderMethodArgumentResolver
public HeaderMethodArgumentResolver(ConversionService cs, ConfigurableBeanFactory beanFactory)
方法详细资料
supportsParameter
public boolean supportsParameter(MethodParameter parameter)
从接口复制的说明:HandlerMethodArgumentResolver
Whether the given method parameter is supported by this resolver.- 参数:
parameter
- the method parameter to check- 返回:
true
if this resolver supports the supplied parameter;false
otherwise
createNamedValueInfo
protected AbstractNamedValueMethodArgumentResolver.NamedValueInfo createNamedValueInfo(MethodParameter parameter)
Create theAbstractNamedValueMethodArgumentResolver.NamedValueInfo
object for the given method parameter. Implementations typically retrieve the method annotation by means ofMethodParameter.getParameterAnnotation(Class)
.- 指定者:
createNamedValueInfo
在类中AbstractNamedValueMethodArgumentResolver
- 参数:
parameter
- the method parameter- 返回:
- the named value information
resolveArgumentInternal
protected Object resolveArgumentInternal(MethodParameter parameter, Message<?> message, String name) throws Exception
Resolves the given parameter type and value name into an argument value.- 指定者:
resolveArgumentInternal
在类中AbstractNamedValueMethodArgumentResolver
- 参数:
parameter
- the method parameter to resolve to an argument valuemessage
- the current requestname
- the name of the value being resolved- 返回:
- the resolved argument. May be
null
- 抛出:
Exception
- in case of errors
handleMissingValue
protected void handleMissingValue(String headerName, MethodParameter parameter, Message<?> message)
Invoked when a named value is required, butAbstractNamedValueMethodArgumentResolver.resolveArgumentInternal(MethodParameter, Message, String)
returnednull
and there is no default value. Subclasses typically throw an exception in this case.- 指定者:
handleMissingValue
在类中AbstractNamedValueMethodArgumentResolver
- 参数:
headerName
- the name for the valueparameter
- the method parametermessage
- the message being processed